What is the shape of diplococci bacteria?

A diplococcus (plural diplococci) is a round bacterium (a coccus) that typically occurs in the form of two joined cells.

What is the structure of meningitis?

The main meningococcal capsular polysaccharides associated with invasive disease are composed of sialic acid derivatives, except for the serogroup A capsule, which consists of repeating units of N-acetyl-mannosamine-1-phosphate.

What is the shape of Neisseria meningitidis?

meningitidis are gram-negative, coffee-bean shaped diplococci that may occur intracellularly or extracellularly in PMN leukocytes.

What is the shape of Neisseria gonorrhoeae?

CHARACTERISTICS: Neisseria gonorrhoeae belongs to the genus Neisseria within the family Neisseriaceae 2. It is a Gram-negative, non-spore forming, non-motile, encapsulated, and non acid-fast bacteria, which appear in kidney bean shape under the microscope 1.

What is the shape of streptococci bacteria?

Streptococci are Gram-positive, nonmotile, nonsporeforming, catalase-negative cocci that occur in pairs or chains.

What is the shape of cocci bacteria?

Bacteria are classified according to their shape. The two main groups of bacteria are cocci (spherical-shaped) and bacilli (rod-shaped) (Brooker 2008).

What gender is most affected by meningitis?

Meningococcal meningitis primarily affects infants, children, and young adults. Males are affected slightly more than females, and account for 55% of all cases, with an incidence of 1.2 cases per 100,000 population, compared to 1 case per 100,000 population among females.

How can meningitis be prevented?

A vaccine can help prevent infection. Even if vaccinated, anybody who has been in close contact with a person with meningococcal meningitis should receive an oral antibiotic to prevent the disease.

What are the virulence factors for gonorrhea?

gonorrhoeae possesses a wide range of virulence determinants, which include the elaboration of pili, Opa protein expression, lipooligosaccharide expression (LOS), Por protein expression and IgA1 protease production that facilitates adaptation within the host.

Why is there no vaccine for gonorrhea?

There is currently no effective gonorrhea vaccine available and the disease is known to be contracted repeatedly without apparently developing protective immunity as a result of previous infection. In addition, antibiotic resistance is increasingly common for this bacterium.

What does gonorrhea look like?

The first noticeable symptom in men is often a burning or painful sensation during urination. As it progresses, other symptoms may include: greater frequency or urgency of urination. a pus-like discharge (or drip) from the penis (white, yellow, beige, or greenish)

What kind of shape does diplococci bacteria have?

As mentioned, diplococci bacteria may appear rounded or elongated in shape. As such, some species may not be truly round as is the case with staphylococci bacteria. As such, they are often described as having an ovococcoid shape.

Why was diplococcus mucosus not identified until 1959?

Diplococcus mucosus. N. mucosa (Diplococcus mucosus) was described in 1906 but was not recognized again until 1959, when it was re-described by Veron et al. The failure to identify strains of N. mucosa occurred because nitrate reduction was not used as differential test until the 1960s.

What does a lancet shaped diplococci mean?

Lancet-shaped gram-positive diplococci from a lower respiratory tract specimen could indicate Streptococcus pneumoniae. Organisms that may be harbored in the upper respiratory tract gain access to the alveolar spaces by aspiration or inhalation.

What kind of diplococci are in image 2?

Image 2 contains many gram-positive diplococci. Lancet-shaped gram-positive diplococci from a lower respiratory tract specimen could indicate Streptococcus pneumoniae. Organisms that may be harbored in the upper respiratory tract gain access to the alveolar spaces by aspiration or inhalation.